HALIFAX, N.S. – A new investigation report from the Transportation Safety Board of Canada (TSB) has concluded that weather, approach procedures, airfield lighting and limited visibility all contributed to a collision between Air Canada Flight 624 and terrain at the Halifax/Stanfield International Airport on March 29, 2015. Early that morning, the Airbus A320 was arriving from Toronto when it struck power lines and hit the snow- ground about 225 metres before the runway threshold at about 12:30 a.m., according to the report, which was published on May 18. After continuing through a localizer antenna, the plane hit the ground nose-down and slid across the terrain, stopping about 570 metres beyond the threshold; 25 people were injured, and the aircraft was destroyed. The subsequent TSB investigation revealed that the flight crew had not detected wind variations that had changed the flight path, since company procedures did not require monitoring of an aircraft’s altitude and distance from the runway. In addition, the runway lights were not set at their maximum brightness, and the crew misinterpreted lights as a visual cue to continue the approach, realizing too late that the plane was too low and too far back. “If the type of approach-lighting system on a runway is not factored into the minimum visibility required to carry out an approach, in conditions of reduced visibility,” the report read, “the lighting available risks being less than adequate for flight crews to assess the aircraft’s position and decide whether or not to continue the approach to a safe landing.”